Added a sound cooldown! This should prevent frustrating ping spam.

Behavior:

• Every user has a "last ping" timestamp.
  
• When a ping is sent to a recipient with sound enabled, their timestamp is updated.
• Pings will only make sound if enough time has passed since the last ping was sent.
  
• This cooldown is user-configurable with /cping prefs cooldown <int>
  
  • Measured in seconds - default is 30

Fixed some logical and language typos:

• Toggling ping by alias no longer says you toggled sound (it did toggle alias pinging properly though)
• Tab autocomplete now works properly for /cping prefs toggle (off-by-1 error in code)

Adjusted some wording when toggling to neaten up the phrasing:

• Toggle sound: "Toggled sound to" -> "Toggled ping sound to"
• Toggle ping by alias: "Toggled aliases to" -> "Toggled ping by alias to"

Huge update.

Many changes:

• Command rework: /chatping (alias: cping)
  • prefs - personal preferences
    • toggle - toggle pinging, just the sound, or ping by alias
    • sound <Sound.SOUND> - set ping sound
    • color <color code> - set ping highlight color
    • alias <String> - add/remove an alias
  • defaults
    • Same as prefs, but this sets the defaults for new players
  • override <player>
    • Same as prefs, but with a player argument to force a certain setting for a certain player
• Permissions rework
  • chatping.user (default: op)
    • Ability to receive pings and adjust personal prefs
  • chatping.admin (default: op)
    • Access to defaults and override arguments
• Aliases (suggestion by llaurin!)
  • Add your own extra names to be pinged with
  • Command will add the alias, or remove it if it's already present
  • Case-insensitive
• Command auto-complete
  • Arguments can now be tab-completed

Changes:

• /chatping command aliases: chat, cp
• Errors are no longer thrown when entering invalid sounds or colors
• Changed from ChatColor names to color codes
• Updated permissions:
  • chatping.ping - unchanged
  • chatping.admin - allows use of the /chatping command

Fixed two typos in the code that caused issues with the new reload command as well as /chatping toggle message.

Additions:

• /chatping version (returns the version of ChatPing your server is running)

I am working on having the name be colored in chat for the user it matches, but for now I have done this workaround: the name remains unchanged in public chat, but the user is sent a message stating who mentioned you and what their message was.